I've just swapped out the original 120GB non-SSD from my A1307 (2009) Air, with a 1.8" Toshiba LIF SSD 128GB.

Any reason why it wouldn't be compatible?

The model is THNSNC128GMLJ by Toshiba. It's 1.8" and has a LIF-type connect.

There's a similar model that I've seen listed on eBay as compatible with the 2nd/3rd generation Airs, but it's model number is slightly different: THNSNB128GMLJ (the difference being a B in the model number, instead of a C).

Any help greatly appreciated. Thanks.